The clamshells should be printed with at least 50% infill and 1mm wall thickness to prevent them from breaking easily. The paddles are fairly simple. Print pieces in the orientation shown if you value your sanity (and don't want to reprint broken parts).

Differences of the remix compared to the original

• New clamshell design split into two halves
• Better bottom triggers, reducing the complexity created by the linkages in the original design. 
• Clamshell secured with zip ties. Use screws and nylocks for all the other holes.